<template>
    <div class="login_container">
        <div class="login_box">
            <!-- 头像区域 -->
            <div class="avatar_box">
                <img src="../assets/logo.png" alt="">
            </div>
            <!-- 登录表单区域 -->
            <el-form ref="loginFormRef" :model="loginForm" :rules="loginFormRules" label-width="0px" class="login_form">
                <!-- 用户名 -->
                <el-form-item prop="userName">
                    <el-input 
                    v-model="loginForm.userName" 
                    prefix-icon="el-icon-user"
                    placeholder="请输入用户名"
                    ></el-input>
                </el-form-item>
                <!-- 密码 -->
                <el-form-item prop="password">
                    <el-input 
                    v-model="loginForm.password" 
                    prefix-icon="el-icon-lock"
                    placeholder="请输入密码"
                    show-password></el-input>
                </el-form-item>
                <!-- 按钮区域 -->
                <el-form-item class="btns">
                    <el-button type="primary" @click="login">登录</el-button>
                    <el-button type="info" @click="resetLoginForm">重置</el-button>
                </el-form-item>
            </el-form>
        </div>
    </div>
</template>

<script>
export default {
    data(){
        return {
            //这是登录表单的数据绑定的对象
            loginForm: {
                userName: '',
                password: ''
            },
            //这是表单的验证规则对象
            loginFormRules: {
                //验证用户名是否合法
                userName: [
                    { required: true, message: '请输入登录名称', trigger: 'blur' },
                    { min: 3, max: 10, message: "长度在3到10个字符之间", trigger: 'blur' }
                ],
                //验证密码是否合法
                password: [
                { required: true, message: '请输入登录密码', trigger: 'blur' },
                    { min: 6, max: 15, message: "长度在6到15个字符之间", trigger: 'blur' }
                ]
            }
        }
    },
    methods: {
        //点击重置按钮，重置登录表单
        resetLoginForm() {
            // console.log(this);
            this.$refs.loginFormRef.resetFields();
        },
        login() {
            this.$refs.loginFormRef.validate(valid => {
                if(!valid) return;
                this.$axios.post('/login', this.loginForm)
                // console.log(res);
                .then(res => {
                    const data = res.data;
                    if(data.code !== '001') return this.$notifyError(data.msg);
                    // this.$message.success(data.msg);
                    this.$notifySucceed(data.msg);
                    //保存token
                    // window.sessionStorage.setItem("token", );
                    //通过编程式导航跳转到后台主页，路由地址是 /admin
                    this.$router.push('/admin');
                })
                .catch(err => {
                    console.log(err);
                });
            });
        }
    }
}
</script>

<style lang="less" scoped>
.login_container{
    background-color: #2b4b6b;
    height: 100%;
}
.login_box{
    width: 450px;
    height: 300px;
    background-color: #fff;
    border-radius: 3px;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    .avatar_box{
        width: 130px;
        height: 130px;
        border: 1px solid #eee;
        border-radius: 50%;
        padding: 10px;
        box-shadow: 0 0 10px #ddd;
        position: absolute;
        left: 50%;
        transform: translate(-50%, -50%);
        background-color: #fff;
        img {
            width: 100%;
            height: 100%;
            border-radius: 50%;
            background-color: #eee;
        }
    }
}
.login_form{
    position: absolute;
    bottom: 0;
    width: 100%;
    padding: 0 20px;
    //元素的总高度和宽度包含内边距和边框(padding 与 border)
    box-sizing: border-box;
}
.btns{
    display: flex;
    //用于描述弹性盒子容器的对齐方式justify-content: flex-start|flex-end|center|space-between|space-around|space-evenly|initial|inherit;
    justify-content: flex-end;
}
</style>
